Spraying machine



Dec. 14, 1943. F, DE BELLIS 2,336,851

SPRAYING MACHINE F11ed Aug, 4, 1941 2 sheets-sheet 1 a@ "mmm 4a 4'? yf 4 6 V 47 35 Vn 3@ 44 32 4@ 5f /f A9 f IIIL'elzI/n Ff" zh/f e e//fs B] si 0 A Home] Dec. 14, 1943. F. DE BELLls 2,336,851

SPRAYING MACHINE Filed Aug. 4, 1941 2 Sheets-Sheet 2 luren/or fa/Wr e ///LS A Home)I Patented Dec. 14, 1943 UNITED STATES PATENT OFFICE SPRAYINGMACHINE Frank De Bellis, Gary, Ind. Application August 4, 1941, Serial No. 405,417

1 Claim.

This invention relates to spraying machines, and an object of the` invention is to provide a portable spraying machine particularly adapted for use in insulating ovens and furnaces such as used in steel mills. v v

As is known, the interior of such furnace ovens is lined or insulated with re clay, insulating cement and similar plastic materials, and an object of this invention is to provide means whereby the insulating material may be sprayed on the wall of the oven interiorly thereof, thus reducing materially the time generally required in the performing of such operation, the performance of such operation with greater safety, and enabling this relining or insulating of the furnace oven to be accomplished, regardless of the thickness of the application, more easily, more simply, and with greater eiiiciency than has heretofore been the CaSe.

The invention together with its objects and advantages will be best understood from a study of the following description taken in connection with the accompanying drawings wherein- Figure l is a side elevational view of the spraying machine showing the features of the present invention.

Figure 2 is a top plan view thereof.

Figure 3 is an enlarged sectional view with the valve shown in elevation through the filling funnel of the tank forming part of the machine.

Referring more in detail to the drawings it will be seen that in the preferred embodiment of the invention there is provided a tank 5 adapted to accommodate the lining or insulating material that is to be sprayed on the surface to be treated.

The tank 5 is supported by rear wheels 6 and a forward wheel I so as to facilitate moving the apparatus from one location to another.

For the axles B on which the rear wheels E are mounted, there is provided a bracket 9 that is substantially U-shaped and has the bight portion I thereof conformably engaging the wall of the tank and Welded or otherwise secured thereto, with the legs II of the bracket depending downwardly and provided at their free ends with bearings to accommodate the stub axles 8 for the wheels '6.

Also each leg II of the bracket is provided with a depending arm I2 that forms, with Athe associated leg, a fork between which the wheel is accommodated, with the free end of the arm I2 being also provided with a. bearing for receiving one end of the stub axle as shown.

The legs II of the bracket I0 are braced with respect to one another through the mediumvof a cross-brace I3 as shown. Y

The front wheel 1 is mounted on an axle I4 that is journaled between the legs of a yoke I5, the shank' I6 of which is journaled in vertically spaced bearing plates I'l extending forwardly from the tank 5 as shown. It will thus be seen that the wheel 'I may be swung either to the right or left to change the direction of travel of the device as found desirable.

To facilitate moving the machine from one location to anotherV there is provided a draft tongue I8 that has a forked end I9 straddling the wheel 'l and pivoted at the ends of the legs of the fork on the axle I4 as shown.

For releasably securing the draft tongue I8 in an out-of-the-way position, there is mounted on the uppermost bearing plate il a keeper hook 20. (See Figure 1.)

The tank 5 receives the charge of material to be sprayed through a funnel 2| provided on the upper'end of a filling neck 22 that rises from the top of the tank 5 as shown.

Interposed in the neck 22 is a manually operable shut-off valve 23, while a strainer screen 24 is suitably mounted in the funnel l2| as shown to advantage in Figure 3.

At the bottom thereof the tank 5 is substantially cone-shaped, as indicated at 25, and at the apex of the cone is provided with an outlet nipple 26.

A discharge pipe 21 is disposed vertically and in proximity to the tank 5 and at its lower end is connected with the outlet nipple 26 through the medium of suitable fittings 28, 29. At the upper end thereof the pipe 2l is connected through the medium of a fitting or union 30 with a iiexible hose 3| that is equipped at its free end with a' nozzle 32. The nozzle 32 has incorporated therein a manually manipulative shut-off valve 33.

The insulating material in the tank 5 is usually mixed with water or other fluid within the tank so as to be suitable for application by spraying process. Also in this connection it will be understood that the contents of the tank 5 are forced therefrom under pressure by compressed air from a suitable source of supply.

Compressed air is supplied to the tank 5 through the medium of a hose 34 leading from a suitable source of supply and connected to a rigid pipe 35 that in turn is connected by a suitable union or coupling 36 with an air inlet nipple 3l rising i from the top wall of the tank 5.

interposed in the pipe 35 is a union 38 through of the aforementioned unions 23, 29, and a union' nected with the pipe 21 through the medium of 4| with the pipe 21, while the pipe 40 is`conthe union or fitting 30. n

From the foregoing, then, it will be seen that when desired, air under pressure, in addition to being supplied directly to the tank 5, is also supplied `through the medium of the pipes 39 and 40 to the pipe 21 when additional pressure is desired for forcing the contents of the tankY 5 through the hose 3| and nozzle 32 for spraying purposes. y

The flow of air through the pipe 40 may be cut off at will through the medium of a valve 42 and the ilow of compressed air through the pipe 39 may be cut oir at will through the medium of a valve 43 interposed in the pipe 39.

Also interposed in the pipe 35 between the union 38 and the hose 34 is a valve 44, while a.

similar valve 45 is interposed in the pipe 35 between the unions 38 and 33.

Likewise, interposed in the pipe 35 between the valve 44 and the hose 34 is a pressure gauge 46.

As a concrete example of operation of the machine, with a proper mixture in the tank 5 and valve y23 closed, close valves 33 and 43, open valves 42, 45 and 44 and then open valves 33. With the pressure on, the mixture will be discharged through the nozzle 32 if valve 42 is slowly closed, the mixture issuing from the nozzle in a ne spray stream. In order to discharge the mixture faster and in a coarser spray, valve 43 is used instead of valve 42 and must be opened wide whereas valve 45 should be adjusted to open the same a quarter turn.

From the description of the invention thus far, it will be seen that the amount of air pressure may be regulated by the opening and closing of the 'selected valves so that, if desired, air may be conducted solely to the tank 5, or where additional pressure is desired, also branched to the pipe 21; valves 42 and 43 being open in the latter instance, and' being closed in the first instance.

Also when it is desired to cut Oi. the supply of air to the tank 5, valve 44 is closed.

Further in accordance with the present invention, the tank 5 lis provided with a suitable safety valve 41 and also with a valve-equipped cock 48, the latter being provided for releasing pressure bail lll for suspending the machine bodily from the crane.

Blast and other furnaces, ovens, kilns, etc., develop cracks and leaks requiring more or less constant relinings. Under old methods and the usual practice, it is then necessary to take the unit partially or wholly out of service and wait `until the heat is sufficiently reduced 4to alford before relling the tank 5, or when otherwise necessary. The cock 48 may also be used to advantage for determining when the tank has been sufciently filled.

Also for drainage purposes, there is provided a drain valve 49 that is connected with the outlet nipple A2li through the medium of couplings or unions 28 and 29 as shown in Figure 1.

Provision is also made whereby thespraying apparatus may be bodily suspended from an overhead crane, and in the present instance such means is in the form of a bail 50 that is pivoted to the tank 5 at opposite sides thereof as at 5|.

It will thus be seen that the spraying machine may be readily transported from placeito place by draftmeans, when resort will be had to the draft tonguev 8, or through the medium of an overhead crane, when resort will be had to the a crew of about twenty men to go in, protected with asbestos gloves, sleeves, a wet hood, and work in ,short relays. The material is spattered and stippled on by hand under the old method. Cracks are sealed for a time, but soon develop new leaks and heat losses. terial so applied is of a more porous nature than under the new method obtainable with this invention. This invention applies a coat of great density and strength. It is driven deep into all iiaws, crevices and cracks. After application with this machine, it has been observed that heat is conserved anda very substantial increase is noted in readings thereof over those for relining jobs done by other methods. This is due to the fact that the clay .is literally shot at the surface to be treated. It strikes with force, drives out and eliminates all air pockets, forming a better bond and suction with the furnace wall, resulting in better adherence, giving the highest obtainable insulation.

It is believed that the manner of operation, and the many advantages of a spraying machine embodying the features of the present invention will be had by those skilled in the art without further detailed description.

It will also be understood that while I have herein illustrated and described what is considered the preferred embodiment of the invention, I am Well aware that in practical elds such details may require alterations coming within the scope of what is claimed.

Having thus described the invention what is claimed as new is:

In a spraying machine of the class described, a closed tank for a spraying mixture, a valved supply neck for charging the tank with mixture, a discharge hose line equipped with a valved nozzle for discharging the mixture at will from said tank, a discharge nipple at the bottom of said tank, and air pressure line opening into the top of the tank for expelling the mixture under pressure out of said nipple, a branch line extending from said pressure line and to which said hose line is connected for by-passing pressure past the tank to said hose line, said branch line having a cut-off valve therein, a mixture discharge line extending from said nipple and connected to said branch line between the cutoff valve and said hose line whereby when said cut-off valve is closed, mixture may be discharged out of the hose line, a second branch line from said pressure line extending to said nipple whereby air under pressure may be introduced through the nipple into the mixture discharge line to accelerate discharge therethrough, said second branch line having a valve therein for opening and closing the same at will, and a pressure control valve in said pressure line between the tank and said second branch line for varying the pressure introduced into the tank when said second branch line is open.

' FRANK DE BELLIS.

The insulating ma- Q 

